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1 //============================================================================= |
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2 // |
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3 // eccequiv.c |
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4 // |
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5 // Given two software ECC algorithms, confirms their equivalence. |
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6 // |
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7 //============================================================================= |
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8 // ####ECOSGPLCOPYRIGHTBEGIN#### |
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9 // ------------------------------------------- |
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10 // This file is part of eCos, the Embedded Configurable Operating System. |
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11 // Copyright (C) 2009 eCosCentric Limited. |
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12 // |
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13 // eCos is free software; you can redistribute it and/or modify it under |
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14 // the terms of the GNU General Public License as published by the Free |
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15 // Software Foundation; either version 2 or (at your option) any later |
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16 // version. |
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17 // |
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT |
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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21 // for more details. |
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22 // |
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23 // You should have received a copy of the GNU General Public License |
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24 // along with eCos; if not, write to the Free Software Foundation, Inc., |
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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26 // |
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27 // As a special exception, if other files instantiate templates or use |
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28 // macros or inline functions from this file, or you compile this file |
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29 // and link it with other works to produce a work based on this file, |
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30 // this file does not by itself cause the resulting work to be covered by |
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31 // the GNU General Public License. However the source code for this file |
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32 // must still be made available in accordance with section (3) of the GNU |
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33 // General Public License v2. |
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34 // |
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35 // This exception does not invalidate any other reasons why a work based |
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36 // on this file might be covered by the GNU General Public License. |
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37 // ------------------------------------------- |
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38 // ####ECOSGPLCOPYRIGHTEND#### |
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39 //============================================================================= |
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40 //#####DESCRIPTIONBEGIN#### |
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41 // |
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42 // Author(s): wry |
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43 // Date: 2009-11-06 |
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44 // |
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45 //####DESCRIPTIONEND#### |
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46 //============================================================================= |
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47 |
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48 #include <cyg/infra/cyg_ass.h> |
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49 #include <cyg/infra/testcase.h> |
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50 #include <cyg/nand/nand.h> |
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51 #include <cyg/nand/nand_devtab.h> |
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52 #include <cyg/nand/util.h> |
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53 #include <cyg/infra/diag.h> |
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54 #include <stdio.h> |
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55 #include <string.h> |
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56 #include "ar4prng.inl" |
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57 |
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58 #define MUST(what) do { CYG_TEST_CHECK((what), #what); } while(0) |
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59 |
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60 __externC cyg_nand_ecc_t linux_mtd_ecc; |
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61 |
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62 static CYG_NAND_DEVICE(fakenand, 0, 0, 0, &linux_mtd_ecc, 0); |
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63 static CYG_NAND_DEVICE(fakenand2, 0, 0, 0, &mtd_ecc256_fast, 0); |
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64 |
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65 void init_fakenand(void) |
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66 { |
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67 if (fakenand.is_inited) |
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68 return; |
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69 |
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70 fakenand.is_inited = 1; |
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71 fakenand.pf = diag_printf; |
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72 fakenand.page_bits = 11; // 2048 byte test pattern. |
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73 fakenand.oob = &nand_mtd_oob_64; |
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74 |
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75 fakenand2.is_inited = 1; |
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76 fakenand2.pf = diag_printf; |
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77 fakenand2.page_bits = 11; // 2048 byte test pattern. |
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78 fakenand2.oob = &nand_mtd_oob_64; |
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79 } |
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80 |
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81 |
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82 void ecc(cyg_nand_device *dev, const CYG_BYTE *data, CYG_BYTE *out) |
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83 { |
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84 if (dev->ecc->init) |
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85 dev->ecc->init(dev); |
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86 dev->ecc->calc_wr(dev, data, out); |
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87 } |
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88 |
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89 const char msg[]="ECC equivalence check"; |
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90 |
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91 #define ECC_BUFFER_SIZE 10 |
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92 CYG_BYTE buf[CYGNUM_NAND_PAGEBUFFER]; |
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93 CYG_BYTE ecc1[ECC_BUFFER_SIZE], ecc2[ECC_BUFFER_SIZE]; |
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94 |
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95 ar4ctx rng; |
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96 extern unsigned char _stext[], _etext[]; |
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97 |
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98 int cyg_user_start(void) |
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99 { |
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100 cyg_nand_device *dev = &fakenand, *dev2 = &fakenand2; |
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101 int i, fails=0; |
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102 |
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103 CYG_TEST_INIT(); |
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104 CYG_TEST_INFO(msg); |
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105 |
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106 #define datasize (fakenand.ecc->data_size) |
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107 #define eccsize (fakenand.ecc->ecc_size) |
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108 |
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109 CYG_ASSERTC(fakenand.ecc->data_size == fakenand2.ecc->data_size); |
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110 CYG_ASSERTC(fakenand.ecc->ecc_size == fakenand2.ecc->ecc_size); |
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111 |
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112 CYG_ASSERTC(datasize <= CYGNUM_NAND_PAGEBUFFER); |
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113 CYG_ASSERTC(eccsize <= ECC_BUFFER_SIZE); |
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114 |
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115 diag_printf("ECC sizes: data %d, ecc %d\n", datasize, eccsize); |
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116 |
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117 ar4prng_init(&rng,_stext, _etext-_stext); |
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118 |
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119 #define N_RUNS 10000 |
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120 |
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121 for (i=0; i<N_RUNS; i++) { |
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122 ar4prng_many(&rng, buf, datasize); |
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123 ecc(dev, buf, ecc1); |
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124 ecc(dev2, buf, ecc2); |
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125 if (0 != memcmp(ecc1, ecc2, eccsize)) { |
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126 ++fails; |
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127 } |
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128 } |
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129 |
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130 if (fails) { |
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131 diag_printf("FAIL: %d mismatches\n", fails); |
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132 CYG_TEST_FAIL_FINISH(msg); |
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133 } else |
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134 CYG_TEST_PASS_FINISH(msg); |
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135 } |
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136 |
